Kelly Brook's Zane split

The 28-year-old actress decided to end her four-year relationship with the 'Titanic' star last month after realising she was too young to settle down.

A source close to Kelly - whose father Ken died from cancer last November - said: "After much soul-searching, Kelly decided that Billy is not the man she wants to marry and has called off the engagement.

"The split is completely amicable and they remain good friends."

Billy, 42, has now moved out of the couple's English farmhouse and back to Los Angeles.

The couple - who had planned to wed last year but had to postpone due to Ken's death and work commitments - met on the set of castaway thriller 'Three' in 2004.

Although Kelly had just split from long-term love Jason Statham, the couple soon got engaged and the British beauty declared she had found her soulmate.

She said: "We see eye-to-eye on most things but it can be fiery, too. He's Mediterranean and I'm so stubborn.

"It's never me that first to make up. We're both romantics so there's lots of magic.

"I've met someone I want to do everything with. He's my best friend really. I've never had that before."